GPDA chairman Nick Heidfeld on Friday admitted it is unlikely the 'Q1' qualifying session will be split for next weekend's Monaco Grand Prix.

Some drivers have called for the split to prevent traffic chaos with 24 cars - some with vastly different pace - all circulating the short and twisty street layout within a short 20-minute window. But the FIA's Charlie Whiting reportedly told the drivers during their regular pre-race briefing in Barcelona that such a rule change would need to be unanimously proposed by the teams.

"We therefore hope that the teams will get together and make a proposal," Mercedes reserve driver Heidfeld told Motorsport-Magazin.com. "I hope so, but honestly, I think that within a week it is a little difficult."